Dual-mode silencer for internal combustion engine exhausting system

An exhaust system and muffler technology, which is applied to exhaust devices, machines/engines, gas chambers, etc., can solve the problems of maintaining low back pressure and the control signal cannot reflect the engine, so as to improve the muffler efficiency and reduce the volume of the sound cavity. The effect of small, high muffling efficiency

Inactive Publication Date: 2014-12-17
FAURECIA EXHAUST CONTROL TECH DEVHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this design, since the control signal does not reflect the speed or exhaust back pressure level in the engine, it cannot be used as a solution to maintain low back pressure at low engine speed

Method used

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  • Dual-mode silencer for internal combustion engine exhausting system
  • Dual-mode silencer for internal combustion engine exhausting system
  • Dual-mode silencer for internal combustion engine exhausting system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] figure 1 One embodiment of the muffler of the present invention is shown. Such as figure 1 As shown, the muffler 100 has an input pipe 101 and two output pipes 102 and 103 . Inlet pipe 101 provides a connection to the engine of the vehicle to which muffler 100 is installed, for receiving exhaust gas. A control device 104 is arranged on the exhaust pipe 102 . Such as figure 1 As shown, the housing 105 is enclosed by two end caps 106 and 107 to form a muffler housing compartment 120 .

[0036] figure 2 yes figure 1 The shown muffler is a schematic perspective view of the muffler without the muffler shell and optional fibers in order to clearly show the internal structure of the muffler. Such as figure 2 As shown, the muffler has three baffles 108 , 109 and 110 . These partitions together with the two end covers 106, 107 divide the muffler housing room 120 into four chambers: between the end cover 106 and the partition 108 is the first chamber 201, between the p...

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PUM

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Abstract

The invention provides a dual-mode silencer for an internal combustion engine exhausting system. The dual-mode silencer comprises a housing, a first end cover, a second end cover, an input pipe, multiple output pipes and a control device, wherein the first end cover and the second end cover are respectively located at two ends of the housing, the input pipe outward extends from the first end cover so as to collect exhausted gas from an internal combustion engine, the multiple output pipes outward extend from the second end cover, and the multiple output pipes, the input pipe and the housing of the silencer form multiple exhausting paths. The control device is arranged on one of the multiple output pipes and used for operably switching the silencer to be in a first operating mode or a second operating mode according to one or more conditions of the internal combustion engine. The corresponding exhausting path is defined in each operating mode, and at least most of the exhausted gas is transferred through the exhausting paths. The exhausting path corresponding to the first operating path is different from the exhausting path corresponding to the second operating path.

Description

technical field [0001] The invention relates to a muffler used in an exhaust system of an internal combustion engine, and the internal combustion engine may be a turbocharged engine or a naturally aspirated engine. Background technique [0002] In order to reduce the noise generated by the internal combustion engine, the exhaust system uses a muffler. A muffler generally includes a housing, at least one inlet pipe for receiving exhaust gas from the internal combustion engine and at least one outlet pipe for discharging the exhaust gas to atmosphere. Sometimes it is necessary to provide two or more exhaust paths in order to obtain a better acoustic efficiency / back pressure trade-off. A major problem with internal combustion engines, especially turbocharged ones, is that the pressure inside the muffler attached to the engine - known as exhaust back pressure - creates resistance to the exhaust gases exiting the engine. Drag caused by back pressure adversely affects the perfor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N1/02F01N1/08
CPCF01N1/023F01N1/084F01N13/08F01N2470/02F01N2470/14F01N2490/06
Inventor 洛朗·马洛潘尼塞
Owner FAURECIA EXHAUST CONTROL TECH DEVHANGHAI
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